Ceiling height increase adds value? Until when is it possible to change the height?

Regional GC?

Yes, exactly. I haven't disclosed any more details about that. It annoys me a bit that I didn't ask for the exact price and then make a decision.

How do you come to 2.55m? How high is the rough construction measurement of your ceilings?

Best regards
Sabine

Comfort height also depends somewhat on the size of the occupants. If the tallest person is 170 cm, then missing 10 to 20 cm might not be a problem. If one is 180 cm or taller, one tends to prefer rooms with a height of 260 to 270 cm. And doors that have a clear passage height of at least 200 cm, such as the 211 cm standard doors, etc. It is also nice when at eye level the window frame (due to [Rollladen]) is not already there or when the top edge of the window glass is just right.

how do you get to 2.55m? What is the rough construction measurement of your ceilings?

Regards
Sabine

From the section drawing.
Did I miss something there?
I hope the 2.55m remain on the ground floor even after installing the central controlled residential ventilation and plastering work.